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THE PSYCHOGERIATRIC ASSESSMENT SCALES (PAS): FURTHER DATA ON PSYCHOMETRIC PROPERTIES AND VALIDITY FROM A LONGITUDINAL STUDY OF THE ELDERLY
Author(s) -
JORM A. F.,
MACKIN A. J.,
CHRISTENSEN H.,
HENDERSON A. S.,
JACOMB P. A.,
KORTEN A. E.
Publication year - 1997
Publication title -
international journal of geriatric psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 129
eISSN - 1099-1166
pISSN - 0885-6230
DOI - 10.1002/(sici)1099-1166(199701)12:1<93::aid-gps468>3.0.co;2-c
Subject(s) - psychology , dementia , clinical psychology , depression (economics) , confirmatory factor analysis , psychometrics , construct validity , anxiety , test validity , longitudinal study , cognition , cognitive decline , psychiatry , geriatric depression scale , medical diagnosis , gerontology , medicine , structural equation modeling , statistics , depressive symptoms , mathematics , disease , pathology , economics , macroeconomics
The PAS is a standardized interview which assesses the changes seen in dementia and depression using a set of scales. There are three scales derived from an interview with the subject (cognitive impairment, depression, stroke) and three from an interview with an informant (cognitive decline, behaviour change, stroke). The aim was to provide data on the psychometric properties and validity of the PAS. The scales were originally developed using data from the first wave of a longitudinal study of the elderly. Reported here are further data on the PAS from the second wave of the same study, carried out 3½ years later. The setting was a community survey carried out in the Australian city of Canberra. Seven hundred and nine elderly persons, with a mean age of 80 years, and 641 informants participated. Besides the PAS, participants were administered several other scales: the Mini‐Mental State Examination, the Informant Questionnaire on Cognitive Decline in the Elderly, the National Adult Reading Test and the Goldberg anxiety and depression scales. Diagnoses of dementia and depression were made with the Canberra Interview for the Elderly, from which the PAS is derived. Confirmatory factor analysis replicated the five‐factor model which underpins the PAS. The PAS was found to correlate with the other scales having similar content and showed correspondence with diagnoses of dementia and depression derived from the Canberra Interview for the Elderly. Longitudinal data supported the validity of the cognitive decline scale as a measure of change. Overall, the results support the original psychometric and validity research on the PAS. © 1997 by John Wiley & Sons, Ltd.